Patent GB-1059423-A (GB)
Title: Apparatus for cutting cloth
IPC: B26F1/38
Filed: 1965-08-02
Abstract: 1,059,423. Cutting apparatus. SCHUBERT & SALZER MASCHINENFABRIK A.G. Aug. 2, 1965 [Aug. 1, 1964], No. 33009/65. Heading B4B. A machine for cutting cloth into garment pieces comprises means for supporting a piece of cloth to be cut, means for moving the cloth backwards and forwards along a first longitudinal or Y co-ordinate, a cutter 6, Fig. 5, and means, viz. a motor M2, for moving the cutter backwards and forwards along a second, X co-ordinate at an angle to the first co-ordinate by means of a lead screw and nut arrangement. As described, the cloth is supported by a belt 2 moving in synchronism with a cutting pattern (8, Fig. 1) over a flat curved surface (5), and is held down by bands (4, 4<SP>1</SP>), or by pressing rollers 44, 45 carried by pivoted arms 144, 145. The pattern (8) may be an endless band stretched around rollers parallel with the X co-ordinate. A bridge 10 carries the driving and control motors, and a support rail for a carriage 62 with the cutter 6 and'a sensing device 7 for the pattern which is carried by a carriage 108 on rails 182. In this embodiment, the pattern. carriage 108 comprises a frame carrying transparent plates between which are placed patterns (8), the sensing being by photo-electric means. The cutter 6 comprises a reciprocating motor 63 driving a knife (66, Fig. 6) and a ring (67) surrounding the knife to hold down cloth around the knife. The carriage (62) carries a motor (M3) which by a gear drive (69) and a control device steers the knife. In operation, a drive motor (M11, Fig. 7) and a clutch (55) are operated to draw off a length of cloth (1) from a beam (11) by means of rollers (12). The cloth passes on to a support extending from the front rollers (42, 53) to the rear rollers (43<SP>1</SP>, 53<SP>1</SP>). When the cloth length is in position, the draw off rollers (12) are stopped and the front end of the cloth length is moved back from the rollers (43<SP>1</SP> to 53<SP>1</SP>) as far as the cutter (6) and the spare length is laid in a storage device (13). The cutter is started and the sensing device follows the pattern and also controls the Y-movement of the cloth. At the end of cutting the cut cloth is conveyed to the rear rollers (43<SP>1</SP>, 53<SP>1</SP>), is wound up with a carry sheet from a roller (31) on to a roller (36), and simultaneously a new length is drawn off from the beam (11). The cut cloth and sheet are then cut off by a knife (32) To reduce friction between the support (2) on the face (5) the latter may have slits or rollers for production of suction between the support and face. Similarly, suction may be provided adjacent the cutter 6. In further embodiments, the support may comprise a perforated drum rotatable backwards and forwards to provide Y movement, the cloth being held thereon by suction, or a section only of a drum may be used. Further the support means may comprise two conveyer belts in front of and behind the drum, loading rollers being used alone or with compressed air to press the cloth downwards. Pattern control may be effected electronically optically, electrically or mechanically by punched cards or film.